Drive pin for a bit and chuck combination in a percussion drilling machine



FIG. 1 is a perspective view showing the design from the bottom, front and one side;

FIG. 2 is a perspective view showing the design from the front and one side;

FIG. 3 is a front view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a back view thereof;

FIG. 7 is a left side view thereof; and,

FIG. 8 is a right side view thereof. 

The ornamental design for a drive pin for a bit and chuck combination in a percussion drilling machine, as shown and described. 